Home / 21,173.81-29,219.27-12,221.01

Finding the Fourth Proportional to 21,173.81, 29,219.27 and 12,221.01

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Solution

The fourth proportional to 21,173.81, 29,219.27 and 12,221.01 is: 16,864.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,173.81 : 29,219.27 = 12,221.01 : x
  2. Step 2: Convert to fraction form
    21,173.81/29,219.27 = 12,221.01/x
  3. Step 3: Cross multiply
    21,173.81x = 29,219.27 × 12,221.01
  4. Step 4: Simplify right side
    21,173.81x = 357,088,929.76
  5. Step 5: Solve for x
    x = 357,088,929.76/21,173.81
  6. Step 6: Final answer
    x = 16,864.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.